Depth heterogeneity of soil organic carbon dynamicsin a heavily grazed alpine meadow on thenortheastern Tibetan Plateau: Aradiocarbon-based approach
文献类型：期刊论文
| 作者 | Yu,SY(Yu,Shiyong)1; Cheng,P(Cheng,Peng)4; Hou,ZF(Hou,Zhangfang)3; Yu,Shiyong; He,HL(He,Honglin)2 |
| 刊名 | Journal of Geophysical Research: Biogeosciences
 |
| 出版日期 | 2017-06 |
| 卷号 | 122期号:7页码:1775-1788 |
| DOI | 10.1002/2016JG003567 |
| 文献子类 | 期刊论文 |
| 英文摘要 | A deep understanding of soil organic carbon (SOC) dynamics on the Tibetan Plateau is crucial for predicting the response of the alpine carbon pool to future climate changes. Here we present information about SOC stocks and turnover time in a heavily grazed alpine meadow on the Tibetan Plateau based on radiocarbon (14C) measurements and inverse modeling. Our results reveal that the alpine meadow soil is composed of three distinct carbon pools. The topsoil represents the active carbon pool, which has a carbon inventory-weighted mean turnover time of 64 years. The CO2 efflux due to the mineral soil respiration from this pool is ca. 48.45 g C m-2 yr-1, accounting for 91 % of the total heterotrophic soil respiration. The intermediate carbon pool has an inventory-weighted mean turnover time of 780 years and the rate of mineral soil respiration in this pool is an order of magnitude lower than that in the active carbon pool. The parental materials feature the passive carbon pool, which has millennia-long turnover time and the mineral soil respiration is trivial. Comparing our results with other 14C-based studies suggests that grazing intensity may alter not only the SOC stocks but also the soil respiration rate in the alpine grassland ecosystem. The heavily grazed alpine meadow broadly fits the exponential relationship between turnover time and mean annual air temperature identified by meta-analysis of published data from the Tibetan Plateau, alpine grassland, and forest sites elsewhere. |
| 项目编号 | 2016YFC0500200 |
| 语种 | 英语 |
| 资助机构 | “100-talent” Program of the ChineseAcademy of Sciences and the NationalKey Technologies R&D Program of China ; “100-talent” Program of the ChineseAcademy of Sciences and the NationalKey Technologies R&D Program of China |
| 源URL | [http://ir.ieecas.cn/handle/361006/5587]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | Yu,Shiyong |
| 作者单位 | 1.School of Geography, Geomatics, and Planning, Jiangsu Normal University, Xuzhou, China 2.Synthesis Research Center ofChina’s Ecosystem Research Network and Key Laboratory of Ecosystem Network Observation and Modeling, Institute ofGeographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China 3.School ofEnvironment and Planning, Liaocheng University, Liaocheng, China 4.State Key Laboratoryof Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China |
| 推荐引用方式 GB/T 7714 | Yu,SY,Cheng,P,Hou,ZF,et al. Depth heterogeneity of soil organic carbon dynamicsin a heavily grazed alpine meadow on thenortheastern Tibetan Plateau: Aradiocarbon-based approach[J]. Journal of Geophysical Research: Biogeosciences,2017,122(7):1775-1788. |
| APA | Yu,SY,Cheng,P,Hou,ZF,Yu,Shiyong,&He,HL.(2017).Depth heterogeneity of soil organic carbon dynamicsin a heavily grazed alpine meadow on thenortheastern Tibetan Plateau: Aradiocarbon-based approach.Journal of Geophysical Research: Biogeosciences,122(7),1775-1788. |
| MLA | Yu,SY,et al."Depth heterogeneity of soil organic carbon dynamicsin a heavily grazed alpine meadow on thenortheastern Tibetan Plateau: Aradiocarbon-based approach".Journal of Geophysical Research: Biogeosciences 122.7(2017):1775-1788. |
入库方式： OAI收割
来源：地球环境研究所
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